Metisse is a 2.5D windowing system, based on the X Window System. 25D (two-and-a-half Dimensional is an informal term used to describe visual phenomena which are considered "between" 2D and 3D A windowing system (or window system) is a component of a Graphical user interface (GUI and more specifically of a Desktop environment, which supports Metisse is available as a window manager for at least Mandriva One 2007[1], PCLinuxOS 2007 [2] and Sabayon Linux. A window manager is Computer software that controls the placement and appearance of windows within a Windowing system in a Graphical user interface Mandriva SA is a publicly traded (symbolMDKFF Linux and Open source Software company with its headquarters in Paris, France and It has many features that set it apart from the traditional 3D "Cube workspace". Windows can be turned 3 dimensionally in any direction, enabling the user to fit more windows onto a screen, and they can be scaled, all while remaining fully operational. Metisse attempts to avoid using effects such as wobbly windows, the development team giving functionality and productivity higher priority than eye-candy.